Pulsar’s Ultrasonic dB Transducer Level Meter

Description

Pulsar’s dB ultrasonic transducers offer reliable level, volume, open channel flow, pump control and differential measurement within liquid and solids applications. dB ultrasonic sensors utilise a low power transducer design with standard interconnecting cables – yet produce extremely high acoustic power to give exceptional results in a wide variety of challenging applications.

Pulsar’s dB Transducer series from Pulsar Measurement is a range of level sensors for wastewater and industrial environments. Ranging from 3 m (9.8 ft) to 40 m (131.2 ft) all of our ultrasonic level sensors provide a reliable level, volume, open channel flow, pump control, and differential level measurement for both liquid and solid applications.

All Pulsar’s dB Ultrasonic Transducers from Pulsar Measurement feature unique DATEM Technology, found only in Pulsar Measurement level sensors. Digital Adaptive Tracking of Echo Movement (DATEM) is an echo discrimination system that works on the basis that it identifies the true moving echo from the background noise, then follows it, ignoring all the competing echoes as it does.

This allows level sensors from Pulsar Measurement to work in cluttered sewage wet wells, a noisy stone silo, an agitated tank, or even through a safety grid. DATEM also looks for echoes within a very small frequency range, which helps to make it especially good at ignoring both acoustic and electrical noise.

The high power of the Pulsar’s dB Ultrasonic Transducer range makes sure that all the echoes from an application can be easily monitored. The result is a highly reliable level measurement in applications that previously could not be considered. Thanks to DATEM Technology, the effective beam angle of our dB and dBi ultrasonic sensors is typically as small as 3 degrees.

The non-contacting design of Pulsar’s dB ultrasonic level sensors means they can be fitted with zero interruption to service, and there’s no time-consuming maintenance needed, providing highly accurate non-contacting level measurement. The ultrasonic level sensor range from Pulsar Measurement is available with multiple options, including submergence shields, PVDF versions for sensors mounted in hazardous locations, and many more!

Submergence shields are useful to keep the face of the transducer clean in applications where the sensor is likely to get submerged. In case of submergence, the controller can be asked to fail high, low, or hold the last reading. When the level drops back below the shield, it allows the controller to resume operation with a clean transducer face.

All Pulsar’s dB transducers are retrofittable with the entire Pulsar Measurement controller range, so when the needs of your measurement change, your system won’t have to.

Features Pulsar’s dB transducers

• ATEX Zones 1 and 2 standard
• I.S. ATEX Zone 0 options
• FM/FMC approval
• Integral temperature compensation
• Narrow beam angles
• IP68/NEMA 6P
• Standard 2 or 3 core screened cable extensions to 1000m
• Patented DATEM (Digital Adaptive Tracking of Echo Movement) echo processing technique

dB ULTRASONIC TRANSDUCER SERIES

Compact, low-power design that gives exceptional results even in challenging situations.

Non-contact ultrasonic transducers to create the perfect solution for your application.

Previously, users had a choice between high-voltage, frequencydependent transducers that were susceptible to electrical noise and needed special, protected interconnecting cables, and weak, low-power transducers that had good hazardous area performance but performed poorly in any but the simplest application.

The dB ultrasonic transducer range has changed all of that, creating a compact, low power transducer design that can be Intrinsically Safe certified and uses standard interconnecting cables, yet produces extremely high acoustic power to give exceptional results in a wide variety of applications.

Features & Benefits

Combine a dB ultrasonic transducer with any of Pulsar Measurement’s Ultra, FlowCERT, Zenith, Quantum, or Blackbox control units to create the perfect solution for your application.

All transducers have flammable atmosphere approval as standard. Standard transducer bodies are made from Valox 357 PBT with a special foam radiating face. Some are available with both body and sealed front face in PVDF for corrosive application

Flanged Transducers

Flange options are available for dB3, dB6, dB10, and dB15 transducers, ANSI or DIN specification, all featuring
full PTFE coating on the process wetted side. Various flange sizes are available. The maximum vessel pressure
on flanges is 0.5 bar (7 psi). These incorporate the performance features of the standard products but additionally offer a front thread mount option to suit threaded nozzles or flanged tank entries. These integral flange options are available with the standard family of transducers, up to the dB15 size.

Foam Face

A foam faced option is available for all the standard range transducers to provide more acoustic power output in dry, dusty environments. This higher acoustic power output increases return echo strength in these dry applications.

Submergence Shield

A shield can be fitted to keep the transducer face clean and dry in applications at risk of submergence. In the case of submergence, the controller can be asked to fail high, low, or hold the last reading. When the level drops back below
the shield, it allows the controller to resume operation with a clean transducer face. The shield can be fitted to the dB3, dB6, dB10, dB15, and dB25 standard transducers.

dBMACH3: High Accuracy Open Channel Flow Transducer

Featuring unique sun and submergence shields, the dBMACH3 transducer is designed specifically for open channel flow applications and is the first ultrasonic transducer with zero effective blanking distance beyond the nose cone, allowing it to be sited as little as a few mm from the high-flow level. One of the critical factors affecting ultrasonic accuracy is the measurement distance, so by minimizing the distance, accuracy is maximized.

Operating at 125kHz frequency the transducer provides high resolution and accuracy. Essential in open channel flow applications. The dBMACH3 is used with the Ultra 4 or 5 and TWIN when in open channel flow mode, or can be paired with FlowCERT all of which provide a typical accuracy of ± 1 mm (0.04 in).

Sanitary Flanged Transducers

For standard transducer from dB3 to dB10 an option of a sanitary flange construction exists. The flange has a full face PTFE (dB3) or PVDF seal for use in hygienic applications. The flange is available in 2” or 3” (on dB3) and 3” on the dB6 and dB10 units. These flanges allow Tri-Clamp fittings to be used on tanks or vessels.

Cable Options

Transducer cable lengths are supplied as standard 5 m, 10 m, 20 m, or 30 m (16 ft, 32 ft, 65 ft, 98 ft). Longer lengths can be supplied as required in 10 m (32.8 ft) steps. It is important to note that the supplied transducer cable may be extended by using standard 2 or 3 core screened cables for up to 1,000 m (3,280 ft) or beyond if needed. No separation is required between the transducer and other cables as they are not susceptible to crosstalk and significant costs can be saved on-site.

Blind Flanges

A range of blind PVC flanges with central 1” BSP or NPT hole is available. These are for mounting transducers within a standpipe or tank using rear thread or dB3 front thread mounting. These are available in 2”, 3”, 4”, and 6” ANSI or DIN 80, DIN 100, DIN 150, and DIN 200 patterns

Specifications

The dB Transducer Series is a range of non-contacting ultrasonic transducers for level, volume, and flow measurement. Available in a variety of models and compatible with all Pulsar controllers so that you have a specific solution to suit your application requirements.

Transducer Specific

(All Transducer) Physical

Environmental

Approvals

Performance

Options:

• PVDF  : Suitable for many applications where chemicals are present
• Front threaded/PVDF : Front threaded versions allow for easy mounting with 1.5 in or 2 in BSP/NPT nose thread
• Submergence shield :  Keeps the transducer face clean and dry in applications at risk of Submergence
• Flanged DIN/ANSI : Available in DIN or ANSI flange specification – all featuring PTFE coating on the process wetted side. Various flange sizes available
• Foam Face : Provides more acoustic power output in dry or dusty applications
• Sanitary flange : Includes a full face PVDF seal for use in hygienic applications
• PTFE : PTFE Coated on the wetted side
• Multiple Cable Lengths Available : Standard: 5 m, 10 m, 20 m, 30 m, 50 m, 100 m (16.4 ft, 32.8 ft, 65.6 ft, 98.4 ft, 164 ft, 328.1 ft). Optional: up to 150 m (492 ft) maximum (increments of 10 m (32.8 ft) only).
• Accessories : Additional aiming kit
• Brackets:  A range of different stainless steel brackets are available to ensure the transducer is mounted in the best possible position for accurate results

Download Datasheet: Pulsars Non-Contacting Ultrasonic Transducer

Reference : pulsar-pm.com

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